As far as I know @jelster is currently writing extremely interesting book which title will be something like “How to develop games with Babylon.js” (printed version due to be published in 2021).
The game which will be the example for this book is currently in development at GitHub - jelster/space-truckers: A game of getting stuff from Point A to Point B... IN SPAAAACCE! , you are welcome!
Here is one of the our visual sketches:
